Thermometers

Ear thermometers use infrared energy to measure body
temperature. The small cone-shaped end of the thermometer is placed in the ear,
and body temperature shows on the digital display. The results appear within
seconds. Some models also show the corresponding oral and rectal temperature
readings.

Electronic thermometers have a temperature probe at one
end and a digital display window at the other end. They work by measuring how
well electricity travels through a wire in the probe. Heating or cooling of the
probe changes the flow of electricity. This change is converted into a
temperature value that shows in the display window. Electronic thermometers can
be used in the mouth, armpit, or rectum.

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